[2] Then-Philippine Senator Edgardo Angara went to Mexico City to meet with heads of relevant institutions to lobby for support for the project to build a galleon museum.

The plans to build a galleon museum were supported by Mexican politicians and figures such as Margarita Zavala, First Lady of the then President Felipe Calderón, Senators Teofilo Torres Corzo, and Humberto Mayans, as well as Mexican academics and publications also expressed support.

A presidential instruction by President Benigno Aquino III was made to provide financial support.

[2] In mid-2015, Sy met with Mexican billionaire Carlos Slim in Mexico with the latter agreeing to donate artifacts to the SM Group for the museum.

[10] The dome structure was built on a 5,000 square meters (54,000 sq ft) lot provided by the SM Group.

[11] In April 2021, the Pasay City Government and SM Group announced plans to temporarily use the dome structure as a vaccination hub as a response against the COVID-19 pandemic.